摘要
背景:在临床修复过程中,人工牙材料的硬度和耐磨性高低会直接影响修复效果。然而到目前为止,在中国的树脂牙行业标准中并没有提到对树脂牙耐磨性和硬度的要求。目的:通过对7种常用的树脂牙进行硬度和耐磨性的比较,为临床修复牙列缺损缺失时人工牙的选择提供理论基础。设计、时间及地点:对比观察实验,于2003-11/2004-05在上海交通大学机械工程学院实验室完成。材料:选择7种不同树脂牙,它们分别为硬质复色合成树脂牙(A)、复色合成树脂牙(B)、合成树脂牙(C)、ENDURA塑钢牙(D)、三层色合成树脂牙(E)、Optostar四层色合成树脂牙(F)、CosmosHXL(G)。方法:用销-盘式摩擦磨损试验机进行磨耗试验,用磨耗质量损耗及电镜观察比较这7种树脂牙的耐磨性能。采用努氏硬度法测试树脂牙的显微硬度。分析树脂牙耐磨性和硬度之间的相关性。主要观察指标:树脂牙耐磨性和硬度。结果:通过磨耗前后各树脂牙质量的损耗及电镜观察结果得出不同树脂牙耐磨性从高到低排列为:D>A>G>E>B>F>C;努氏硬度值由高到底的顺序是:D>A>G>E>F>B>C。树脂牙磨耗失质量和硬度值的相关系数为-0.888(P<0.01)。结论:材料组成成分、相对分子质量和树脂牙加工工艺的差别可造成不同树脂牙硬度和耐磨性能之间的差异;不同树脂牙的硬度和耐磨性呈正相关。
BACKGROUND： The wear resistance and hardness of artificial tooth would affect repairing effects in clinic. However, there is lack of professional standard for resin teeth in China. OBJECTIVE： To provide a theoretic foundation for the choosing of the resin teeth in clinic via comparing the wear resistance and hardness among 7 different resin teeth. DESIGN, TIME AND SETTING： A contrast observation. The experiment was performed at the laboratory of Mechanical Engineering College, Shanghai Jiao Tong University from November 2003 to May 2004. MATERIALS： A total of 7 kinds of different resin teeth were selected, namely, hard multi-layer synthetic resin teeth （A）; multi-layer synthetic resin teeth （B）; synthetic resin teeth （C）; EMDURA resin teeth （D）; three-layer synthetic resin teeth （E）; optostar four-layer synthetic resin teeth （F）; and Cosmo HXL （G）. METHODS： The wear test was processed by a pin-plate wear machine. The result was measured by the weight loss through wearing and the surfaces of the wear scar were observed by a scanning electronic microscope （SEM）; hardness was measured by Knoop hardness. Meanwhile, the relativity between the hardness and wear resistance of resin teeth was analyzed. MAIN OUTCOME MEASURES： The wear resistance and hardness of resin teeth. RESULTS： According to the weight loss and SEM examination, the wear resistance of the different resin teeth was D〉A〉G〉E〉B〉F〉C; and the hardness of different resin teeth was D〉A〉G〉E〉F〉B〉C. The correlation coefficient between the weight loss and hardness was -0,888 （P 〈 0.01 ）. CONCLUSION： The variation of the wear resistance of the resin teeth may influenced by their different components, molecular weight and rnanufactural methods. There are positive correlation between the hardness and wear resistance of resin teeth.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2009年第51期10109-10112,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
基金
上海市重点学科建设项目(S30206)~~
